When my son moved out, I took down his saltwater fishtank and since my husband didn't believe that the primed baseboard heater should be painted, it is really,

really rusty.
Now, please be patient with me as I do not know what things are called but I am handy and willing to do this repair.
What is my best option to repairing this? The face plate I can of course remove. I was thinking of using my dremmel on the part connected to the wall since it is a small space of about 4 ft of rusting.
My husband believes that now that it started rusting we will always have a problem with it rusting. I believe if I get it all to the metal and put the correct primer (any suggestions here is welcome) it will not.
Oh, one more problem that may make things difficult. I cannot handle the smell of some paints. Paint removers and enamals really make me ill, even if it is in the house and I am not doing it.
thank you in advance for any help or suggestions